Machine for making reinforced webs



July 6, 1954 c. E. CLAFF ET AL v MACHINE FOR MAKING REINFORCED WEBSOriginal Filed June 6, 1947 Z'gllllllllfl'lllllllll llllllllll UIIIII.lllllllllllllllll) Patented July 6, 1954 Chester E. Claif and Carl A.Moeller, Randolph, Mass assignors, by mesne. assignments, to M; B.Claff. & Sons, Inc., Randolph, Mass.,.a corporation of'MassachusettsOriginal: application June 6, 19.45, Serial. No. 752,980; now PatentNo.. 2,646,914, dated July Divided and this application April 25, 1 950,SeriaLNo. 158,156-

v 7 Claims. 1 The present invention relatestothe manufacture of ,boxesor cartons from pasteboard or the like,and,more particularly tomachin'es for pro.-

ducing reinforced webs from which blanks may bemade for such. boxes .or.cartons.

Some types of 'boxes or cartons, such, for. ex.- ample, asboxesv inwhich shoesare customarily packed. and; stored onv the shelves of the.retail dealer, are. subjected, in. use to excessive strain atthe cornersdue. to the common practice of shoe salesmen of. drawing the boxoutwardly from. the store. shelf, and, often from beneath other boxesstacked above, by inserting one or more fingers downwardly, within. thebox or upwardly within the cover, and pulling against the front. wall ofthe box or cover. This puts a heavystrain .onthefront top corners of thebox or. the bottom front corners of. the. cover, with the resultthat theboxes and. covers are frequentlytornat one or both front corners.

It. is the objectofthe present invention to provide a machine forproducing webs ofpasteboard or the like having. a reinforcing cord orstring secured along one or both edges thereof, from which websreinforced blanks maybe formed whichare suitable for use in making'boxesand box covers having string reinforcement at their top andbottomcorners, respectively.

With this object in view, the present invention consists in a machinefor applying and securing a-;reinforcing-string or cord to the edges ofthe web of cardboard or thelike-to form a reinforced web from whichindividual box blanks may be produced.

Preferably-the opposite edges of the web of box material .are cut orsplit inwardly a short distance to form a cleft or seat tov receive thecord to-which adhesive has been applied, and a cover paper is adhesivelysecured to the opposite marginal. surfaces of. the web, passing tightly4 around the cordjseatedin the cleft. If desired, however, thesplitting. of the edge of the web mayrbe omitted and the adhesivelycoated cord applied directly to the unsplit edge with coverpaper-passing; aroundthe cord and secured to the: oppositemarginsof'the. web.

In the accompanying drawings, whichillustratemore or lessdiagrammatically the present invention, Fig. 1 is atop =plan-view andFig. 2 is a side elevation of the machine for-slitting the edges -of"theweb of -'box blank material and laying the reinforcing cord in theslit thus formed; and applying-the web-of cover paper'to one face; of 4the-cardboard; web; and-for folding the=sameover and aroundthecord-andonto the opposite face of the cardboard to providea compositeweb of cardboard, reinforcing cord and cover paper preparatory to theforming of individual' blanks therefrom; Fig. 30 is avertical,transverse, section on line 3-3 of Fig. 2, showing a portion of aslitting knife for slitting the edge of the pasteboard web as itadvances between the top and bottom plates or supports; Fig. 4. is avertical, transverse, sectional view taken online 47-4 of Fig. 2,showing a portion of the cord-guiding roll laying the cord in the cleftin the margin of the pasteboard web; Fig. 5; is a vertical transverse,sectional view on line 5-5 of Fig. 2, showing a side margin of thepasteboard web. with the cord positioned in the cleft. andthe coverpaper applied to the. lower face of the cardboard web andextendingmarginally therefrom, preparatory to being folded around theedge of the pasteboard and cord and onto the top face of the cardboard;Fig. 6 is a transverse sectional view of the cardboard web, reinforcingstring and cover. paper in final assembled position; Fig. 7 is asectional View of a modification of the invention in which theadhesively coated cord is applied directly to the edge of the unsplitpasteboard web, and Fig. 8 shows in section the cover paper on the lowerface of such web and wrapped around the cord and secured to the topmarginal face; Fig. 9 is a perspective of the-finished blank suitablefor a box cover, and Fig. 10 isasimilar view of a cover shown upsidedown formed from the blank of Fig. 9; Fig. 11 is a perspective view,partly in section and on an enlarged scale, of a corner of the boxcover, still upside down, with the side and bottom cut away to show theinternal construction.

In the machine of Figs. land 2, the web of cardboard I5 i supplied froma roll I1, from which it is drawn by the power driven feed rolls ES;From the feed rolls the web passes through the edge guides 2!, whichguide and align the webpreparatory to the edge slitting operationwhich-is performed by the circular slittingknives 23 on the verticalrotating shafts 25.-

In order to present the web properly to the edge slitting knives,stationary guides are provided in the form of a lower support 26 andiatop plate 2lbetween which the web passes. The inner adjacent faces 28 ofthese guides arebeveled at their outer edges as shown in Fig. 3, toaccommodate the beveled edges 29' of the slitting knives, and permit thelatter to spread open the slit to provide a groove or seat for the cord;

Thecords 30- are fed from a supply cop or roll 3| pasttheadhesive-applying roll 33, where they are coated with glue or othersuitable adhesive supplied from the tank 35 and transfer roll 31. Thecord-applying roll 38 has a grooved periphery 39 to receive the cordfrom the roll 33, and guides and presses the cord into the cleft or slit4| in the edge of the web [5, the latter at such time passing betweenthe top guide 43 and bottom support 45.

The web l5 with glue-coated cord 30 embedded in the slits on each edgethereof next passes to the rolls 4'! where the cover paper 49 from theroll 5| is applied to the bottom face of the cardboard web !5. The topface of the cover paper on its way from the supply 5| is coated by thepasting roll 51 with paste received from the transfer roll 5% and pastereservoir 6|. The Web 49 of cover paper is wider than the web l5 ofpasteboard, so that when the cover paper is applied to the bottom faceof the web of pasteboard, there is a projecting margin 63 of cover paperon each side of the pasteboard web, as shown in Figs. 1 and 5.

The combined pasteboard and cover paper webs then pass to the plows 65,shaped to turn over the projecting margins 63 of the cover paper aroundthe edge of the cardboard and reinforc ing cord and onto the topmarginal surface of the cardboard, as shown in Fig. 6.

From the plows the composit web passes between the pressure and feedrolls 6'! which press the parts forcibly together, at the same timeadvancing the web to the conventional creasing, slitting, and severingmechanisms for producing blanks of conventional form such as shown inFig. 9.

This blank comprises the main or body por-- tion 69, side wings II, andend wings 13 with the end wing extensions 15. Longitudinal creases orfold lines 11 are positioned between the side wings H and the body 69,and transverse fold lines 19 separate the end wings 13 from the body 69and extend onto the s de wings to separate the side wing extensions orcorner tabs 8| from the side wings. Supplementary transverse creases 83lie between the end wings I3 and extensions 15.

The reinforcing cord 30 is shown in dotted outline at the outer edges ofthe side Wings H, with the cover paper 63 wrapped around the edges ofthe cord, and extending inwardly on the face of the side wings. Slots ornotches 85 are provided at the ends of the blank, which separate the.corner tabs 8! from the end wings 13 and extensions 15.

The blank shown in Fig. 9 is a box cover blank from which the box covershown in Fig. 10 will be formed or set up, with the side wings 1| turnedup onto the sides and the corner tabs 81 turned inwardly to form aportion of the end construction. The end wings 13 are turned up andsecured by glue or adhesive to the inturned corner tabs GI, and the endwing extensions 15 turned inwardly and downwardly and secured byadhesive to the inner faces of the corner tabs and the end wings.

As shown in enlarged detail in Fig. 11, the reinforcing cord lies alongthe top edges of the side wings and corner tabs being firmly secured inthe cleft or slit by adhesive and the cover paper 63.

When the box is drawn forward by the shoe salesman by his fingersinserted behind the front end of the cover, the strain on the corners ofthe cover will be taken largely by the reinforcing cord, and tearing orbreaking of the cover and box board at such times will be prevented.

While the present invention has been shown and described as embodied ina machine for producing a reinforced web particularly designed andintended for use in making box blanks for pasteboard shoe boxes and thelike with a cover paper which also serves as a binder to bind or securethe reinforcing cord to the edge of the web, it is not to be limitedthereto but may be embodied in machines for making reinforced webs fromweb material other than pasteboard, and securing or binding materialsother than cover paper, such reinforced web being intended for otheruses than the manufacture of boxes or cartons.

Nor is the invention to be limited to the specific forms and arrangmentof parts herein shown and described, but may be embodied in other formsand arrangements within the scope of the language of the appendedclaims.

Where in th foregoing description reference is made to a box or boxes,this is to be understood as including box covers.

This application is a division of our pending application filed June 6,1947, Serial No. 752,980, now Patent No. 2,646,914.

Having thus described the invention, what is claimed is:

1. A machine for making a reinforced web having, in combination, meansfor supplying web material, a rotary knife for slitting the edge of theweb inwardly, flaring means engaging the edge margins of the web tosupport the web adjacent the slitting knife and permit a, limited depthof the slit, devices for supplying a reinforcing cord, and a guide rollhaving a grooved cord-receiving face for guiding and pressing the cordinto the slit in the edge of the web.

2. A machine for making a reinforced web having, in combination, meansfor supplying web material, a rotary slitting knife for slitting theedge of the Web inwardly, an edge guide for guiding the web past theslitting knife, devices for supplying a reinforcing cord, a guide rollhaving a grooved, cord-receiving face for uiding and pressing the cordinto the slit in the edge of the web, and an edge guide for guiding theweb adjacent the guide roll, said edge guide comprising a pair of webengaging members spaced from one another to receive the webtherebetween, the inner faces of said members being outwardly beveled topermit a limited separation of the margins of the web adjacent the slitduring the cord applying operation to position the cord at the edge ofthe web.

3. A machine for making a reinforced web having, in combination, meansfor supplying web material, a pair of rotary slitting knives withwedge-shaped peripheries for slitting opposite edges of the web inwardlyand spreading apart the edge portions of the web adjacent the slit, edgeguides for supporting the edges of the web, said guides being providedwith outwardly flaring web-engaging faces for supporting and positioningthe edges of the web as it passes the slitting knives to permit alimited spreading apart of the said edge portions, devices for supplyingreinforcing cords, and a pair of guide rolls each having a groovedcord-receivin face for guiding and pressing the cords into the slits inthe edges of the web and positioning the cords at the edges of the web.

4. A machine for making a reinforced web having, in combination, guidingmeans for the web, means for advancing web material through the webguiding means, slitting means positioned adjacent the Web guiding meansfor slitting the directing the cord into the slit in the edge of the,

web, the web guiding means in the region of cord introduction havingspaced wall portions engaging and supporting the edge margins of theweb, the wall spacing at the margin of the web cor,- respondingsubstantially to the total thickness of the web and cord and the wallspacing inwardly of the margin corresponding substantially to the webthickness, whereby the cord is positioned at the edge of the web.

5. A machine for making a reinforced web having, in combination, meansfor supplying web material, web guiding means having spaced surfacesbetween which the web is advanced, means for advancing the web throughthe web guiding means, slitting means positioned adjacent the webguiding means for slitting the edge of the web inwardly, means forsupplying a reinforcing cord, and cord guiding means for directing thecord into the slit in the edge of the web, the web guiding means in thevicinity of the cord guiding means having flared surfaces adjacent theedge margins of the web to support the slit portions and limit theopening thereof substantially to the thickness of the cord and therebyto position the cord at the edge of the web.

6. A machine for making a reinforced web having, in combination, meansfor supplying web material, guiding means having spaced surfaces betweenwhich the web is advanced, means for advancing the web through the webguiding means, slitting means positioned adjacent the guiding means forslitting the edge of the web inwardly, means for supplying a reinforcingcord, means for applying adhesive to the cord, and grooved cord guidingmeans for directing the adhesively coated cord into the slit in the webedge, the web guiding means in the vicinity of the grooved cord guidehaving spaced guide surfaces to engage and support the split edges ofthe web, the spacing of said guide surfaces at the web edgecorresponding substantially to the total thick- 6 ness of web and cord,said guide surfaces inwardly adjacent the web edge having a spacingcorresponding substantially to the web thickness,

, thereby to limit the slit opening at the web edge substantially to thecord thickness for positioning the cord at said edge.

7. A machine for making a reinforced web having, in combination, meansfor supplying web material, guiding means having spaced surfaces betweenwhich the web is advanced, means for advancing the web through the webguiding means, slitting means positioned adjacent the guiding means forslitting the edge of the web inwardly, means for supplying a reinforcingcord, means for applying adhesive to the cord, grooved cord guidingmeans for directing the adhesively coated cord into the slit in the webedge, the web guiding means in the vicinity of the grooved cord guidehaving spaced guide surfaces to engage and support the split edges ofthe web, the spacing of said guide surfaces at the web edgecorresponding substantially to the total thickness of web and cord, saidguide surfaces inwardly adjacent the web edge having a spacingcorresponding substantially to the web thickness, thereby to limit theslit opening at the web edge substantially to the cord thickness forpositioning the cord at said edge, means for supplying adhesively coatedpaper, and means for applying said paper to one face of the web, aroundthe slit edge in contact with the cord in the slit, and onto the otherface of the web.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date Re. 19,847 Springer Feb. 4, 1936 1,591,062 Smith July 6, 19261,597,257 White Aug. 24, 1926 1,636,525 Meeker July 19, 1927 2,184,970Allen Dec. 26, 1939 2,285,447 Lichter June 9, 1942 2,304,534 Burns Dec.8, 1942

